Material: High quality metal buckle + Elastic rope Length: About 100 cm Width:About 0.7 cm SCIENTIFIC DESIGN: Upgraded Version No Tie Shoelaces feature a unique curved magnetic buckle and flat elastic rope design. The magnetic and snap-on double-lock design of the lock makes you never worry that your shoelace will loosen; The lace locks are curved and fitted with a flat stretch cord that blends perfectly with your feet to keep your feet comfortable all day. TIME SAVER/EASE OF USE: With no tie design, never worry about tying your shoes again during any activity. Easy to use. Putting on shoes could not be easier. Slip on/Slip off, these elastic shoe laces are quick and easy. PERFECT FOR EVERYONE: No tie elastic shoelaces are a great gift for seniors suffering from arthritis or other disabilities, autistic children, runners looking to speed their triathlon transition up, and a must for sports enthusiasts. SIMPLE INSTALLATION: One size fits all (kids AND adults), quick to install, easy to use. Each pair is suitable for lacing up 1 pair of shoes. Easy installation instructions provided.