diff --git a/src/sdkClient/client.ts b/src/sdkClient/client.ts
index 5216d2d2..7a280122 100644
--- a/src/sdkClient/client.ts
+++ b/src/sdkClient/client.ts
@@ -11,6 +11,7 @@ import { IMPRESSION, IMPRESSION_QUEUEING } from '../logger/constants';
 import { ISdkFactoryContext } from '../sdkFactory/types';
 import { isConsumerMode } from '../utils/settingsValidation/mode';
 import { Method } from '../sync/submitters/types';
+import { ImpressionDecorated } from '../trackers/types';
 
 const treatmentNotReady = { treatment: CONTROL, label: SDK_NOT_READY };
 
@@ -34,11 +35,11 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
     const stopTelemetryTracker = telemetryTracker.trackEval(withConfig ? TREATMENT_WITH_CONFIG : TREATMENT);
 
     const wrapUp = (evaluationResult: IEvaluationResult) => {
-      const queue: [impression: SplitIO.ImpressionDTO, track?: boolean][] = [];
+      const queue: ImpressionDecorated[] = [];
       const treatment = processEvaluation(evaluationResult, featureFlagName, key, attributes, withConfig, methodName, queue);
       impressionsTracker.track(queue, attributes);
 
-      stopTelemetryTracker(queue[0] && queue[0][0].label);
+      stopTelemetryTracker(queue[0] && queue[0].imp.label);
       return treatment;
     };
 
@@ -59,14 +60,14 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
     const stopTelemetryTracker = telemetryTracker.trackEval(withConfig ? TREATMENTS_WITH_CONFIG : TREATMENTS);
 
     const wrapUp = (evaluationResults: Record<string, IEvaluationResult>) => {
-      const queue: [impression: SplitIO.ImpressionDTO, track?: boolean][] = [];
+      const queue: ImpressionDecorated[] = [];
       const treatments: Record<string, SplitIO.Treatment | SplitIO.TreatmentWithConfig> = {};
       Object.keys(evaluationResults).forEach(featureFlagName => {
         treatments[featureFlagName] = processEvaluation(evaluationResults[featureFlagName], featureFlagName, key, attributes, withConfig, methodName, queue);
       });
       impressionsTracker.track(queue, attributes);
 
-      stopTelemetryTracker(queue[0] && queue[0][0].label);
+      stopTelemetryTracker(queue[0] && queue[0].imp.label);
       return treatments;
     };
 
@@ -87,7 +88,7 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
     const stopTelemetryTracker = telemetryTracker.trackEval(method);
 
     const wrapUp = (evaluationResults: Record<string, IEvaluationResult>) => {
-      const queue: [impression: SplitIO.ImpressionDTO, track?: boolean][] = [];
+      const queue: ImpressionDecorated[] = [];
       const treatments: Record<string, SplitIO.Treatment | SplitIO.TreatmentWithConfig> = {};
       const evaluations = evaluationResults;
       Object.keys(evaluations).forEach(featureFlagName => {
@@ -95,7 +96,7 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
       });
       impressionsTracker.track(queue, attributes);
 
-      stopTelemetryTracker(queue[0] && queue[0][0].label);
+      stopTelemetryTracker(queue[0] && queue[0].imp.label);
       return treatments;
     };
 
@@ -128,7 +129,7 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
     attributes: SplitIO.Attributes | undefined,
     withConfig: boolean,
     invokingMethodName: string,
-    queue: [impression: SplitIO.ImpressionDTO, track?: boolean][]
+    queue: ImpressionDecorated[]
   ): SplitIO.Treatment | SplitIO.TreatmentWithConfig {
     const matchingKey = getMatching(key);
     const bucketingKey = getBucketing(key);
@@ -138,15 +139,18 @@ export function clientFactory(params: ISdkFactoryContext): SplitIO.IClient | Spl
 
     if (validateSplitExistence(log, readinessManager, featureFlagName, label, invokingMethodName)) {
       log.info(IMPRESSION_QUEUEING);
-      queue.push([{
-        feature: featureFlagName,
-        keyName: matchingKey,
-        treatment,
-        time: Date.now(),
-        bucketingKey,
-        label,
-        changeNumber: changeNumber as number,
-      }, track]);
+      queue.push({
+        imp: {
+          feature: featureFlagName,
+          keyName: matchingKey,
+          treatment,
+          time: Date.now(),
+          bucketingKey,
+          label,
+          changeNumber: changeNumber as number,
+        },
+        track
+      });
     }
 
     if (withConfig) {
diff --git a/src/storages/inMemory/InMemoryStorage.ts b/src/storages/inMemory/InMemoryStorage.ts
index b8833370..7ec099d1 100644
--- a/src/storages/inMemory/InMemoryStorage.ts
+++ b/src/storages/inMemory/InMemoryStorage.ts
@@ -37,8 +37,8 @@ export function InMemoryStorageFactory(params: IStorageFactoryParams): IStorageS
     const noopTrack = () => true;
     storage.impressions.track = noopTrack;
     storage.events.track = noopTrack;
-    if (storage.impressionCounts) storage.impressionCounts.track = noopTrack;
-    if (storage.uniqueKeys) storage.uniqueKeys.track = noopTrack;
+    storage.impressionCounts.track = noopTrack;
+    storage.uniqueKeys.track = noopTrack;
   }
 
   return storage;
diff --git a/src/storages/inMemory/InMemoryStorageCS.ts b/src/storages/inMemory/InMemoryStorageCS.ts
index 09d62ac8..bfaec159 100644
--- a/src/storages/inMemory/InMemoryStorageCS.ts
+++ b/src/storages/inMemory/InMemoryStorageCS.ts
@@ -55,8 +55,8 @@ export function InMemoryStorageCSFactory(params: IStorageFactoryParams): IStorag
     const noopTrack = () => true;
     storage.impressions.track = noopTrack;
     storage.events.track = noopTrack;
-    if (storage.impressionCounts) storage.impressionCounts.track = noopTrack;
-    if (storage.uniqueKeys) storage.uniqueKeys.track = noopTrack;
+    storage.impressionCounts.track = noopTrack;
+    storage.uniqueKeys.track = noopTrack;
   }
 
   return storage;
diff --git a/src/trackers/__tests__/impressionsTracker.spec.ts b/src/trackers/__tests__/impressionsTracker.spec.ts
index f833e0e4..c10bf309 100644
--- a/src/trackers/__tests__/impressionsTracker.spec.ts
+++ b/src/trackers/__tests__/impressionsTracker.spec.ts
@@ -75,7 +75,7 @@ describe('Impressions Tracker', () => {
 
     expect(fakeImpressionsCache.track).not.toBeCalled(); // cache method should not be called by just creating a tracker
 
-    tracker.track([[imp1], [imp2], [imp3]]);
+    tracker.track([{ imp: imp1 }, { imp: imp2 }, { imp: imp3 }]);
 
     expect(fakeImpressionsCache.track.mock.calls[0][0]).toEqual([imp1, imp2, imp3]); // Should call the storage track method once we invoke .track() method, passing queued params in a sequence.
   });
@@ -98,7 +98,7 @@ describe('Impressions Tracker', () => {
     expect(fakeIntegrationsManager.handleImpression).not.toBeCalled(); // The integrations manager handleImpression method should not be invoked if we haven't tracked impressions.
 
     // We signal that we actually want to track the queued impressions.
-    tracker.track([[fakeImpression], [fakeImpression2]], fakeAttributes);
+    tracker.track([{ imp: fakeImpression }, { imp: fakeImpression2 }], fakeAttributes);
 
     expect(fakeImpressionsCache.track.mock.calls[0][0]).toEqual([fakeImpression, fakeImpression2]); // Even with a listener, impression should be sent to the cache
     expect(fakeListener.logImpression).not.toBeCalled(); // The listener should not be executed synchronously.
@@ -162,7 +162,7 @@ describe('Impressions Tracker', () => {
     expect(fakeImpressionsCache.track).not.toBeCalled(); // storage method should not be called until impressions are tracked.
 
     trackers.forEach(tracker => {
-      tracker.track([[impression], [impression2], [impression3]]);
+      tracker.track([{ imp: impression }, { imp: impression2 }, { imp: impression3 }]);
 
       const lastArgs = fakeImpressionsCache.track.mock.calls[fakeImpressionsCache.track.mock.calls.length - 1];
 
@@ -187,7 +187,7 @@ describe('Impressions Tracker', () => {
 
     expect(fakeImpressionsCache.track).not.toBeCalled(); // cache method should not be called by just creating a tracker
 
-    tracker.track([[impression], [impression2], [impression3]]);
+    tracker.track([{ imp: impression }, { imp: impression2 }, { imp: impression3 }]);
 
     const lastArgs = fakeImpressionsCache.track.mock.calls[fakeImpressionsCache.track.mock.calls.length - 1];
 
@@ -208,19 +208,19 @@ describe('Impressions Tracker', () => {
 
     const tracker = impressionsTrackerFactory(settings, fakeImpressionsCache, fakeNoneStrategy, strategy, fakeWhenInit);
 
-    tracker.track([[impression]]);
+    tracker.track([{ imp: impression }]);
     expect(fakeImpressionsCache.track).toBeCalledTimes(1); // impression should be tracked if userConsent is undefined
 
     settings.userConsent = 'UNKNOWN';
-    tracker.track([[impression]]);
+    tracker.track([{ imp: impression }]);
     expect(fakeImpressionsCache.track).toBeCalledTimes(2); // impression should be tracked if userConsent is unknown
 
     settings.userConsent = 'GRANTED';
-    tracker.track([[impression]]);
+    tracker.track([{ imp: impression }]);
     expect(fakeImpressionsCache.track).toBeCalledTimes(3); // impression should be tracked if userConsent is granted
 
     settings.userConsent = 'DECLINED';
-    tracker.track([[impression]]);
+    tracker.track([{ imp: impression }]);
     expect(fakeImpressionsCache.track).toBeCalledTimes(3); // impression should not be tracked if userConsent is declined
   });
 
diff --git a/src/trackers/impressionsTracker.ts b/src/trackers/impressionsTracker.ts
index f33e1174..d5a6ef89 100644
--- a/src/trackers/impressionsTracker.ts
+++ b/src/trackers/impressionsTracker.ts
@@ -1,7 +1,7 @@
 import { objectAssign } from '../utils/lang/objectAssign';
 import { thenable } from '../utils/promise/thenable';
 import { IImpressionsCacheBase, ITelemetryCacheSync, ITelemetryCacheAsync } from '../storages/types';
-import { IImpressionsHandler, IImpressionsTracker, IStrategy } from './types';
+import { IImpressionsHandler, IImpressionsTracker, ImpressionDecorated, IStrategy } from './types';
 import { ISettings } from '../types';
 import { IMPRESSIONS_TRACKER_SUCCESS, ERROR_IMPRESSIONS_TRACKER, ERROR_IMPRESSIONS_LISTENER } from '../logger/constants';
 import { CONSENT_DECLINED, DEDUPED, QUEUED } from '../utils/constants';
@@ -23,20 +23,20 @@ export function impressionsTrackerFactory(
   const { log, impressionListener, runtime: { ip, hostname }, version } = settings;
 
   return {
-    track(impressions: [impression: SplitIO.ImpressionDTO, track?: boolean][], attributes?: SplitIO.Attributes) {
+    track(impressions: ImpressionDecorated[], attributes?: SplitIO.Attributes) {
       if (settings.userConsent === CONSENT_DECLINED) return;
 
-      const impressionsToStore = impressions.filter(([impression, track]) => {
+      const impressionsToStore = impressions.filter(({ imp, track }) => {
         return track === false ?
-          noneStrategy.process(impression) :
-          strategy.process(impression);
+          noneStrategy.process(imp) :
+          strategy.process(imp);
       });
 
       const impressionsLength = impressions.length;
       const impressionsToStoreLength = impressionsToStore.length;
 
       if (impressionsToStoreLength) {
-        const res = impressionsCache.track(impressionsToStore.map((item) => item[0]));
+        const res = impressionsCache.track(impressionsToStore.map((item) => item.imp));
 
         // If we're on an async storage, handle error and log it.
         if (thenable(res)) {
@@ -60,7 +60,7 @@ export function impressionsTrackerFactory(
         for (let i = 0; i < impressionsLength; i++) {
           const impressionData: SplitIO.ImpressionData = {
             // copy of impression, to avoid unexpected behaviour if modified by integrations or impressionListener
-            impression: objectAssign({}, impressions[i][0]),
+            impression: objectAssign({}, impressions[i].imp),
             attributes,
             ip,
             hostname,
diff --git a/src/trackers/types.ts b/src/trackers/types.ts
index d684bb2e..fb54f3b6 100644
--- a/src/trackers/types.ts
+++ b/src/trackers/types.ts
@@ -17,8 +17,19 @@ export interface IImpressionsHandler {
   handleImpression(impressionData: SplitIO.ImpressionData): any
 }
 
+export type ImpressionDecorated = {
+  /**
+   * Impression DTO
+   */
+  imp: SplitIO.ImpressionDTO,
+  /**
+   * Whether the impression should be tracked or not
+   */
+  track?: boolean
+};
+
 export interface IImpressionsTracker {
-  track(impressions: [impression: SplitIO.ImpressionDTO, track?: boolean][], attributes?: SplitIO.Attributes): void
+  track(impressions: ImpressionDecorated[], attributes?: SplitIO.Attributes): void
 }
 
 /** Telemetry tracker */