diff --git a/audit/types.go b/audit/types.go
index 35aa52a..8245b2a 100644
--- a/audit/types.go
+++ b/audit/types.go
@@ -19,7 +19,7 @@ type DataAuditResult struct {
 
 	pubKey []byte
 
-	passSG, failSG []*refs.ObjectID
+	passSG, failSG []refs.ObjectID
 
 	failNodes, passNodes [][]byte
 
@@ -91,7 +91,7 @@ func (a *DataAuditResult) SetPublicKey(v []byte) {
 }
 
 // GetPassSG returns list of Storage Groups that passed audit PoR stage.
-func (a *DataAuditResult) GetPassSG() []*refs.ObjectID {
+func (a *DataAuditResult) GetPassSG() []refs.ObjectID {
 	if a != nil {
 		return a.passSG
 	}
@@ -100,14 +100,14 @@ func (a *DataAuditResult) GetPassSG() []*refs.ObjectID {
 }
 
 // SetPassSG sets list of Storage Groups that passed audit PoR stage.
-func (a *DataAuditResult) SetPassSG(v []*refs.ObjectID) {
+func (a *DataAuditResult) SetPassSG(v []refs.ObjectID) {
 	if a != nil {
 		a.passSG = v
 	}
 }
 
 // GetFailSG returns list of Storage Groups that failed audit PoR stage.
-func (a *DataAuditResult) GetFailSG() []*refs.ObjectID {
+func (a *DataAuditResult) GetFailSG() []refs.ObjectID {
 	if a != nil {
 		return a.failSG
 	}
@@ -116,7 +116,7 @@ func (a *DataAuditResult) GetFailSG() []*refs.ObjectID {
 }
 
 // SetFailSG sets list of Storage Groups that failed audit PoR stage.
-func (a *DataAuditResult) SetFailSG(v []*refs.ObjectID) {
+func (a *DataAuditResult) SetFailSG(v []refs.ObjectID) {
 	if a != nil {
 		a.failSG = v
 	}
diff --git a/object/types.go b/object/types.go
index 596ed3e..63002bc 100644
--- a/object/types.go
+++ b/object/types.go
@@ -34,7 +34,7 @@ type SplitHeader struct {
 
 	parHdr *Header
 
-	children []*refs.ObjectID
+	children []refs.ObjectID
 
 	splitID []byte
 }
@@ -228,7 +228,7 @@ type SearchRequest struct {
 }
 
 type SearchResponseBody struct {
-	idList []*refs.ObjectID
+	idList []refs.ObjectID
 }
 
 type SearchResponse struct {
@@ -500,7 +500,7 @@ func (h *SplitHeader) SetParentHeader(v *Header) {
 	}
 }
 
-func (h *SplitHeader) GetChildren() []*refs.ObjectID {
+func (h *SplitHeader) GetChildren() []refs.ObjectID {
 	if h != nil {
 		return h.children
 	}
@@ -508,7 +508,7 @@ func (h *SplitHeader) GetChildren() []*refs.ObjectID {
 	return nil
 }
 
-func (h *SplitHeader) SetChildren(v []*refs.ObjectID) {
+func (h *SplitHeader) SetChildren(v []refs.ObjectID) {
 	if h != nil {
 		h.children = v
 	}
@@ -1316,7 +1316,7 @@ func (r *SearchRequest) SetBody(v *SearchRequestBody) {
 	}
 }
 
-func (r *SearchResponseBody) GetIDList() []*refs.ObjectID {
+func (r *SearchResponseBody) GetIDList() []refs.ObjectID {
 	if r != nil {
 		return r.idList
 	}
@@ -1324,7 +1324,7 @@ func (r *SearchResponseBody) GetIDList() []*refs.ObjectID {
 	return nil
 }
 
-func (r *SearchResponseBody) SetIDList(v []*refs.ObjectID) {
+func (r *SearchResponseBody) SetIDList(v []refs.ObjectID) {
 	if r != nil {
 		r.idList = v
 	}
diff --git a/refs/bench_test.go b/refs/bench_test.go
index dc5b393..aed5f79 100644
--- a/refs/bench_test.go
+++ b/refs/bench_test.go
@@ -15,9 +15,8 @@ func BenchmarkObjectIDSlice(b *testing.B) {
 }
 
 func benchmarkObjectIDSlice(b *testing.B, size int) {
-	ids := make([]*ObjectID, size)
+	ids := make([]ObjectID, size)
 	for i := range ids {
-		ids[i] = new(ObjectID)
 		ids[i].val = make([]byte, 32)
 		rand.Read(ids[i].val)
 	}
diff --git a/refs/convert.go b/refs/convert.go
index bb6e988..feb851f 100644
--- a/refs/convert.go
+++ b/refs/convert.go
@@ -110,7 +110,7 @@ func (o *ObjectID) FromGRPCMessage(m grpc.Message) error {
 	return nil
 }
 
-func ObjectIDListToGRPCMessage(ids []*ObjectID) (res []*refs.ObjectID) {
+func ObjectIDListToGRPCMessage(ids []ObjectID) (res []*refs.ObjectID) {
 	if ids != nil {
 		res = make([]*refs.ObjectID, 0, len(ids))
 
@@ -122,23 +122,17 @@ func ObjectIDListToGRPCMessage(ids []*ObjectID) (res []*refs.ObjectID) {
 	return
 }
 
-func ObjectIDListFromGRPCMessage(idsV2 []*refs.ObjectID) (res []*ObjectID, err error) {
+func ObjectIDListFromGRPCMessage(idsV2 []*refs.ObjectID) (res []ObjectID, err error) {
 	if idsV2 != nil {
-		res = make([]*ObjectID, 0, len(idsV2))
+		res = make([]ObjectID, len(idsV2))
 
 		for i := range idsV2 {
-			var id *ObjectID
-
 			if idsV2[i] != nil {
-				id = new(ObjectID)
-
-				err = id.FromGRPCMessage(idsV2[i])
+				err = res[i].FromGRPCMessage(idsV2[i])
 				if err != nil {
 					return
 				}
 			}
-
-			res = append(res, id)
 		}
 	}
 
diff --git a/refs/marshal.go b/refs/marshal.go
index c496221..aa04b63 100644
--- a/refs/marshal.go
+++ b/refs/marshal.go
@@ -104,9 +104,9 @@ func (o *ObjectID) StableMarshal(buf []byte) ([]byte, error) {
 
 // ObjectIDNestedListSize returns byte length of nested
 // repeated ObjectID field with fNum number.
-func ObjectIDNestedListSize(fNum int64, ids []*ObjectID) (sz int) {
+func ObjectIDNestedListSize(fNum int64, ids []ObjectID) (sz int) {
 	for i := range ids {
-		sz += proto.NestedStructureSize(fNum, ids[i])
+		sz += proto.NestedStructureSize(fNum, &ids[i])
 	}
 
 	return
@@ -122,11 +122,11 @@ func (o *ObjectID) StableSize() int {
 
 // ObjectIDNestedListMarshal writes protobuf repeated ObjectID field
 // with fNum number to buf.
-func ObjectIDNestedListMarshal(fNum int64, buf []byte, ids []*ObjectID) (off int, err error) {
+func ObjectIDNestedListMarshal(fNum int64, buf []byte, ids []ObjectID) (off int, err error) {
 	for i := range ids {
 		var n int
 
-		n, err = proto.NestedStructureMarshal(fNum, buf[off:], ids[i])
+		n, err = proto.NestedStructureMarshal(fNum, buf[off:], &ids[i])
 		if err != nil {
 			return
 		}
diff --git a/refs/test/generate.go b/refs/test/generate.go
index 3912ffa..7a142e3 100644
--- a/refs/test/generate.go
+++ b/refs/test/generate.go
@@ -48,13 +48,13 @@ func GenerateObjectID(empty bool) *refs.ObjectID {
 	return m
 }
 
-func GenerateObjectIDs(empty bool) []*refs.ObjectID {
-	var ids []*refs.ObjectID
+func GenerateObjectIDs(empty bool) []refs.ObjectID {
+	var ids []refs.ObjectID
 
 	if !empty {
 		ids = append(ids,
-			GenerateObjectID(false),
-			GenerateObjectID(false),
+			*GenerateObjectID(false),
+			*GenerateObjectID(false),
 		)
 	}
 
diff --git a/storagegroup/types.go b/storagegroup/types.go
index 6c493ed..38f66f6 100644
--- a/storagegroup/types.go
+++ b/storagegroup/types.go
@@ -13,7 +13,7 @@ type StorageGroup struct {
 
 	exp uint64
 
-	members []*refs.ObjectID
+	members []refs.ObjectID
 }
 
 // GetValidationDataSize of unified storage group structure.
@@ -66,7 +66,7 @@ func (s *StorageGroup) SetExpirationEpoch(v uint64) {
 
 // GetMembers of unified storage group structure. Members are objects of
 // storage group.
-func (s *StorageGroup) GetMembers() []*refs.ObjectID {
+func (s *StorageGroup) GetMembers() []refs.ObjectID {
 	if s != nil {
 		return s.members
 	}
@@ -76,7 +76,7 @@ func (s *StorageGroup) GetMembers() []*refs.ObjectID {
 
 // SetMembers into unified storage group structure. Members are objects of
 // storage group.
-func (s *StorageGroup) SetMembers(v []*refs.ObjectID) {
+func (s *StorageGroup) SetMembers(v []refs.ObjectID) {
 	if s != nil {
 		s.members = v
 	}
diff --git a/tombstone/marshal.go b/tombstone/marshal.go
index f39d5d9..cd778b9 100644
--- a/tombstone/marshal.go
+++ b/tombstone/marshal.go
@@ -43,7 +43,7 @@ func (s *Tombstone) StableMarshal(buf []byte) ([]byte, error) {
 	offset += n
 
 	for i := range s.members {
-		n, err = proto.NestedStructureMarshal(membersFNum, buf[offset:], s.members[i])
+		n, err = proto.NestedStructureMarshal(membersFNum, buf[offset:], &s.members[i])
 		if err != nil {
 			return nil, err
 		}
@@ -62,9 +62,8 @@ func (s *Tombstone) StableSize() (size int) {
 
 	size += proto.UInt64Size(expFNum, s.exp)
 	size += proto.BytesSize(splitIDFNum, s.splitID)
-
 	for i := range s.members {
-		size += proto.NestedStructureSize(membersFNum, s.members[i])
+		size += proto.NestedStructureSize(membersFNum, &s.members[i])
 	}
 
 	return size
diff --git a/tombstone/types.go b/tombstone/types.go
index 2bcc19d..6cce852 100644
--- a/tombstone/types.go
+++ b/tombstone/types.go
@@ -11,7 +11,7 @@ type Tombstone struct {
 
 	splitID []byte
 
-	members []*refs.ObjectID
+	members []refs.ObjectID
 }
 
 // GetExpirationEpoch returns number of tombstone expiration epoch.
@@ -47,7 +47,7 @@ func (s *Tombstone) SetSplitID(v []byte) {
 }
 
 // GetMembers returns list of objects to be deleted.
-func (s *Tombstone) GetMembers() []*refs.ObjectID {
+func (s *Tombstone) GetMembers() []refs.ObjectID {
 	if s != nil {
 		return s.members
 	}
@@ -56,7 +56,7 @@ func (s *Tombstone) GetMembers() []*refs.ObjectID {
 }
 
 // SetMembers sets list of objects to be deleted.
-func (s *Tombstone) SetMembers(v []*refs.ObjectID) {
+func (s *Tombstone) SetMembers(v []refs.ObjectID) {
 	if s != nil {
 		s.members = v
 	}