Embodiments of the present invention relate to polyethylene-based compositions, monolayer films, multilayer films, laminates, and articles. In one aspect, a polyethylene-based composition comprises (A) at least 95% by weight, based on the total weight of the polyethylene-based composition, of one or more polyethylenes; and (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a polydimethylsiloxane having a number average molecular weight (M.sub.n) of 1,000 to 40,000 g/mol, wherein the polyethylene-based composition has a density of 0.865 to 0.915 g/cm.sup.3 and a melt index (I.sub.2) of 0.5 to 25 g/10 minutes.

Polyethylene composition has a density of 949-955 kg/m 3 and a melt index MI.sub.2 between 15 and 40 g/10 min, and comprises a low molecular weight fraction (A) and a high molecular weight fraction (B), wherein the amount of (A) is 52-58 wt % based on the weight of (A)+(B), and the melt index MI.sub.2 of (A) is 200-600 g/10 min. Injection moulded articles, preferably caps or closures, made from the composition are also described.