'Oh-No' Proof Boyshort

We think our 'Oh No' Proof Boyshort Period Underwear is pretty great. These cute boyshort undies are made with super soft lycra fabric and carbon cotton, meaning you stay dry when it matters the most.

Our seamless design lets you say goodbye to underwear lines, and the super thin built-in panty liner (sucks up 1-3 tsp of moisture) is invisible even under tight clothes. 

Girls boy shorts that have got your back.


  • Boy oh boy, do we have the period boyshorts of your dreams!

    These comfy girls’ boyshorts give you protection from menstrual leaks, odor, moisture, and underwear lines. These are no period panties of yesteryear — this cute and active cut is perfect for girls who want to look and feel good during Auntie Flo’s monthly visit. Our miracle boyshort undies are leak-proof and can absorb up to 3 teaspoons of blood — that’s the equivalent of 2 regular tampons! Plus, they’re totally seamless (can we get a hallelujah for no VPL in your cute summer dress?). We especially love how these nylon and spandex boyshorts wick away any moisture and sweat, keep you feeling fresh and odor-free throughout your period. Our boyshorts for girls are lightweight, cute, and 100% comfortable. Buy your first pair today, or surprise a teen with a gift they’ll love.

    How Knixteen girls’ boyshorts have your back during shark week: Super soft LYCRA SPORT® fabric and carbon cotton to keep you feeling dry ‘Oh-No’ Proof Technology™ (includes a super thin built-in panty liner that sucks up 1-3 tsp of moisture) Moisture-lock sides keep leaks in Our seamless boy shorts design helps you to avoid VPL, even under tight clothes No-stink technology fights any unpleasant smells Great for girls with more sensitive skin, and they don’t itch, rub, or cut into your skin. Perfect for wearing to school, gym class, sleepovers, and even horseback riding!

    Materials: Body: 77% nylon, 23% LYCRA® Gusset Liner: 86% cotton, 10% spandex, 4% carbon Gusset: ‘Oh-No’ Proof Technology ™

    Care Instructions: Machine wash cold with mild detergent, do not bleach, lay flat to dry. *Flat rate shipping to US and Canada. Ships to select countries worldwide. *For hygiene reasons all underwear are final sale.