AllPro Youth Pro-Lock Performance Long Sleeve T-Shirt

When it comes to youth performance apparel that works as hard as the kids wearing it, the AllPro 48400Y Youth Pro-Lock Performance Long Sleeve T-Shirt stands in a class of its own. Built specifically for young athletes, school teams, and active kids who need real performance from their gear, the 48400Y delivers moisture management, sun protection, and a print-ready surface that decorators love — all at a price that makes bulk ordering easy.

At CheapesTees, we carry the full 48400Y lineup at the best wholesale prices online, with free shipping on every order to the lower 48 states.

What Is Pro-Lock Technology?

Most polyester performance shirts share a common frustration for decorators: dye migration. When heat is applied during screen printing or heat transfer, the garment's dye can bleed upward into the ink layer — blurring edges, muddying colors, and degrading the design over time. AllPro's Pro-Lock technology solves this problem entirely.

Pro-Lock uses cationic disperse dyeing — a process that bonds color molecules deeper into the polyester fiber at the molecular level — creating a bleed-resistant print surface that produces vibrant, crisp graphics. Your custom artwork stays sharp and vivid wash after wash, even on dark or bright colorways. For schools, teams, and events ordering custom-decorated performance shirts for youth athletes, this is the feature that sets the 48400Y apart from standard polyester tees.

Built for Active Kids

The 48400Y is constructed from 100% polyester interlock jersey at 4 oz./yd² — light enough to keep young athletes comfortable during intense activity, but substantial enough to hold its shape and look polished on and off the field. The interlock construction gives the fabric a smooth, even finish that wears well and holds up to the kind of all-day use kids put apparel through.

Built-in moisture management pulls sweat away from the skin and accelerates evaporation, keeping kids cool and dry during high-output activity. The snag-resistant construction protects the fabric from pulls and pills during contact sports and rough play. And with a UPF 50 rating, the 48400Y blocks 98% of harmful UV rays — an essential feature for outdoor sports, field days, track meets, and any activity that keeps young athletes in direct sun for extended periods.

The rolled forward shoulder seam is a thoughtful ergonomic detail that repositions the seam away from the top of the shoulder, eliminating pressure points and allowing a fuller range of arm motion — exactly what active kids need. Hemmed long sleeves finish the look cleanly, and the tear-away label keeps the back of the neck irritation-free while giving decorators a blank canvas for custom branding.

Perfect for Teams, Schools, and Events

The 48400Y is the go-to youth performance long sleeve for school field days, youth sports teams, athletic camps, spirit wear programs, and custom tournament shirts. Available in over 20 colors — including solids like Black, Navy, Red, Gold, Forest Green, and Charcoal, heather tones like Heather Navy, Heather Royal, and Heather Granite, and vivid neons like Neon Orange and Neon Yellow — it covers every school color and team palette imaginable.

The 48400Y is fully CPSIA (Consumer Product Safety Improvement Act) Tracking Label Compliant, meeting all federal safety requirements for children's apparel sold or distributed in the United States. For the matching adult and unisex version in XS through 5XL, see the AllPro 48400.

Key Specs at a Glance

• 4 oz./yd² (US), 6.7 oz./L yd (CA), 100% polyester interlock jersey with Pro-Lock technology
• Pro-Lock collection’s cationic disperse dyed polyester locks in colorfastness to create a bleed-resistant print surface that produces vibrant, crisp graphics
• Moisture-management properties
• Snag-resistant
• UPF 50 protection
• Standard fit
• Self-fabric collar
• Rolled forward shoulder for improved fit and comfort
• Hemmed long sleeve
• Tear away label for comfort and relabeling
• CPSIA Tracking Label Compliant

Responsible Supplier: this product was made in a facility that is OEKO-TEX and FLA certified.