XIANQI Product Description: Massage function reduce shoulder pain and fatigue--Thick air cushion particles with massage function, effectively disperse the gravity to relieve shoulder fatigue, make you travel more convenient and comfortable. Waterproof --Surface with high quality water-resistant comfortable and durable nylon material,flexible and effective to prevent air cushion movement. Hook and loop fasteners open and close,easy to disassemble--Substantial cushioning and strong Fastener Tape closure,easily put on and taken off, it adds a much needed cushion functionality to the bag. Wide range of applications--suitable for 3.8cm-6 cm shoulder strap .Works for various Totes,Duffel bags,Backpacks,Laptop Messengers,Camera Bags,Guitar Cases,Briefcase and More. Dimension-- 250 x 80 x10mm, Total Package weight: about 65g;Package included:2 x Black Replacement Shoulder Strap Pad.