RAB says about the Alpine 400 Long

The Alpine 400 is a premium duck down bag with a slim fitting shape. Featuring Pertex® Quantum fabric and recycled nylon, it offers a good balance of comfort, weight and warmth for cold spring conditions on alpine missions.
Weight saving chevron baffle design on upper torso, reduces down migration and optimises core warmth. Trapezoidal boxwall construction with differential cut, to maximise loft and warmthYKK zipped internal stash pocket3-dimensional shaped down filled neck collar to seal in warmthYKK 3/4 length main zip with down filled baffle to trap warmthYKK Anti-snag zip insert and anti snag internal zip guardAngled foot box for relaxed sleeping postureZipped storage sack with water-resistant base for home storage Drawcord stuffsack includedHand-filled in Derbyshire UKTapered Mummy Shape

Product specifications

Outer fabric	100% recycled polyamide
Insulation	650fp r.d.s certified european duck down with nikwax fluorocarbon-free hydrophobic finish
Temperaturbereik	Comfort -1°c - comfort limit -7°c - extremelimit -25
Dimensions	230 x 81 cm