NXTRND Mouth guard sports: Heavy-duty, durable, long lasting sports accessories. Built from the ground up, NXTRND has quickly become one of the leading mouth guard sports brands. Thousands of satisfied customers and counting. High grade thermoplastic. Instant protection. Our Mouth piece has been designed to prevent damage to your teeth, lips, arches, jaw and gums. The customizable fit ensures that the teeth protector clamps firmly in place while providing ease of speech. One size only. Designed to comfortably fit most adult mouths, our bite guards come equipped with an absorbent inner liner. NXTRND is a leading manufacturer of mouthguard products. What’s in the box. 2 Boxing Mouthguards and a Fitting Guide. For Adults or kids 11+ years of age. Do not use with braces. Carefully follow the fitting instructions. After every use, rinse the mouthpiece in cool water.