The Castelli Idro 2 is the smallest lightest Gore-Tex® rain jacket Castelli has ever produced. Is so light and so packable it redefines waterproofs. No longer do you need to choose between carrying a bulky waterproof or a lightweight but non-waterproof shell. The Idro is as light as a wind shell, as breathable as a windshell, as compact as a windshell but offers complete waterproofing, guaranteed waterproofing and with Shakedry Technology it never wets out it never gets heavier it never needs retreating. If you are in the market for a new shell make it the Idro.The Idro 2 is approx 20g lighter than the original Idro it has a slightly longer tail a reflective word-mark and re-engineered cuffs. The weight savings come from ditching the access zip to the back pocket.Key Features:Our lightest ever Gore-Tex® jacket.Gore-Tex® Active Shakedry technology with a new permanent beading surface.Guaranteed to keep you dry.Minimalist construction is ultralight and ultra packable, never leave it behind.Fully taped seams.Easy-sliding waterproof YKK® Vislon® zipper.New Anatomic wrist closure.Reflective Castelli Wordmark.Weight 107g (Size L) .