Hi Viz Yellow. One size fits all. Ultra-light – 3 lbs. (1.4 kg.) Base layer material made out of Cordura fabric – temperature regulating Outlast® space technology offering maximum comfort in hot and humid conditions; Panels are made out of Ballistic steel, clipped together for flexibility; sealed in nylon pouches Protection Levels (panels): CAST certification – KR1 (Knife); CAST certification – SP1 (Spike); VPAM certification – W5 (Blunt Force) Specially engineered 0.65mm thin trauma liner is effectively reducing the level of blunt force trauma; Fully tested and certified to NIJ 3 0115.00 std. stab resistance (100+ joules), including self-testing. Manufactured according to ISO 9001:2008 quality control standard; Velcro straps on front and back of the vest for your badge and/or name tags (FRONT velcro 3″ X 6″; BACK 2″ X 10″); Front and back pocket for additional upgrades (vest can be upgraded to ballistic); Proudly designed and manufactured in Canada.