Tri-Top Chest Binder

by Underworks

The Tri-Top chest binder is one of the strongest of Underworks' compression chest binders and is designed to give you a binder that fits right, feels good, and hides discretely underneath your clothing, with no seams or bunching.
  • Uses 70% nylon/30% spandex medical-grade compression material for a tight, firm fit that moves with you
  • Three layers of compression across the front can flatten any bulges, while a single layer across the back helps engage the muscles of your whole upper torso for increased comfort.
  • This Underworks binder is a mid-tummy length, perfect for when you just need some help with your chest or want to wear shorter shirts
  • Made in the USA 

X-small 28-30 / Small 31-33 / Medium 34-36 / Large 37-40/ X-large 41-44 / 2X 45-48 / 3X 49-52

    MEASURE YOUR CHEST - With arms down on the side, take a snug measurement around the fullest part of your chest over the nipples.

    If unsure, please order the next size up.


    Wash in cold water, gentle cycle, tumble dry low or flat dry. No bleach, no iron.

    Check out our complete guide to binding for FTMs.

    Customer Reviews

    Based on 15 reviews
    lucas james
    very diffrent material to gc2b but binds very well

    good binder scrachy under armpits

    Pallas Dinkins
    Hella comfy

    It’s a very comfy binder and works well, the mesh back makes it good for warm days as well!

    Sebastian Wall
    Best binders I’ve bought

    These binders are QUALITY! <3 my only issue is the size chart. Maybe because it’s in inches? I’m not sure but it’s not very accurate and I have one too big and one too small.

    Alex Labonte
    Best binder ever!

    This is the most comfortable binder. It really covers all the skin and my chest is so flat compared to when I'm wearing other binders. I love it so much. <3

    Kaye-leigh Jones

    left rashes along the lines of the arm hole and remained stiff and rashy after washing.


    Transguy Supply is a small 2 person team. You can generally expect your order to ship within 7-10 days of purchase.

    Final Sales

    Please note that due to the sensitive nature of the items in question, all STP, Packer, Harness, and Underwear sales are final. Please make sure you have double-checked product size guides and have selected the correct item.

    International Orders

    Please note that for all non-US orders, you may be charged local taxes in order to retrieve your order. See our Shipping Policies for more details.