Weight:70g/ball & 29meter long Usually need 3 5 spools for a full head Hair material: low temprature flame retardant synthetic fiber, easy to ends. Package include: 1pc*70g/Ball Brazilian Wool Hair Yarn 1.Why Choose Brazilian Wool Hair? A: DIY Hair Style,Great for Jumbo Braids Senegalese Twist/Faux Locs/Wraps 2.How many Packs do you need ? A: Usually 4 Packs can make a full head. 3.Pros of Brazilian Wool? A: Light Weight,Quite Economical,Itch Free,Reusable,No Pressure on your edges.Tends to Hold Style. 4.How Long to Keep Yarn Braids in ? A: For most girls,they want to keep their yarn braids for 5 weeks,However,others complain that after 2 weeks they observe itchiness, Keeping them for more than 5 weeks can result in more build-ups,While wearing yarn braids,you must wash them at least once a week.