The Sierra Women’s pant is now having a more robust, spring snap for the waistband (no more hook and eye). Apart from that - this pant has passed the test of time so is staying put! FEATURES: NEW Spring Snap on Waistband, Fully Seam Sealed YKK Zippers Fully Adjustable Waist Velcro, Belt Loops, Jacket to Pant Connectomatic Interface, NEW Spring Snaps, Articulated Knee, Recco - Avalanche Rescue System. Grip Tight Snow Gaitor Inside Leg Venting Logo Embossed Lining New Internal Fit System - ramped-up wicking, breathability & stretch lining, Warm back panel.