mens 3 1 system jacket

A men's 3-in-1 system jacket includes a waterproof outer shell plus a removable insulated inner liner so you can wear the shell alone, the liner alone, or both together for all-season versatility.

Some listings specify performance ratings—for example a 20,000 mm waterproof rating and 27K breathability for the outer shell—though ratings vary by model.

Common features include full front zips (sometimes with storm flaps), hidden two-way zippers with snap closures, removable or adjustable hoods, adjustable tab or snap cuffs, and some models add an internal drawcord at the hem.

They commonly include multiple secure pockets such as zippered chest and hand pockets; one down parka in the listings specifies three pockets in total.

Lengths range from at-waist and at-hip up to below-hip, and fits are typically listed as regular fit or standard fit depending on the model.