■ Weight,Sizes & Colors 195g for size M, 220g for size L Two Size: M(54-58cm), L(57-63cm) 5 ranging colors ■ Construction Outer Shell Construction:In-mold polycarbonate shell with EPS liner Inner Shell:Thermoformed reinforcement shock absorbing polystyrene ■ Fit System Lightweight fit system with an easy-to-turn dial for adjustments ■ Ventilation 29 Wind Tunnel vents with internal channeling ■ Comfort Removable and washable inner padding in Coolmax material- COOLMAX internal pads(cushioning comfort pad) are used in larger surface in contact with the head for increased comfort. Detachable for hand wash and anti-allergenic. Comfort Liner and Chin Pading keeps a good fit ■ Be Seen No reflective rear sticker ■ Compatibility NO ■ Certification CE EN 1078 ■ Accessories NO 1. Dear, we will send the items within 3-10 days(working days) after your payment is received. 2. In general, we will send this items to you by Seller's shipping method, while it will update tracking information within 3-5 days after delivery normally, you can track it on the website of order detail. 3. You also can choose the fast shipping method like DHL, EMS,FEDFEX, TNT or UPS , but you need to pay for then freight. 1. All of our products will be checked one by one before sending out. 2. Buyer should check the package once receiving. If it is damaged during freight, please refuse to sign for it and get in touch with us in time. 3. If there are any quality problems, please offer detailed information to us in 7 days against the receiving, We will confirm the problem and then offer a satisfied solution to you. 4. Buyers are responsible for return postages if the problems are caused by your side.