Light weight, neon colored, for daily use. Medical-grade synthetic polyisoprene. Features & details High-quality Latex-free grooming elastics - approx. 100 count. Space age material outperforms Latex and rubber. Will not become sticky like rubber or absorb water like Latex. Will not cause allergic reactions. Other uses: dog bows, doll hair, corn row bands, horse manes, craft use. approximately 100 pcs this is sold by weight not counted manually so there might be 95 to 120 pcs each pack. the number pf bands is approximately 100 pcs. The sizes normally used for tying dog hair daily is 3/8 or 5/16 and 1/4 the smaller sizes are usually used on show days and on bows.