

GUI Cap – Structured Six-Panel Baseball Cap
Our GUI Cap is the signature piece that started the Gui Gui brand. This structured six-panel baseball cap combines classic styling with modern comfort, featuring premium cotton twill construction and an adjustable snapback closure.
Designed for everyday wear, the GUI Cap delivers a mid-profile fit that works across face shapes and personal styles. We’ve refined every detail—from the reinforced eyelets to the curved brim—to create headwear that looks sharp and feels comfortable from morning to night.
- Six-panel construction with reinforced front panels for structure
- 100% cotton twill fabric with breathable eyelets
- Adjustable plastic snapback closure fits most head sizes
- Curved pre-shaped brim with eight rows of stitching
- Embroidered Gui Gui logo on front center panel
Premium Cotton Twill Construction

We manufacture the GUI Cap using heavyweight cotton twill, a durable woven fabric that holds its shape through years of regular wear. The six-panel design distributes tension evenly across the crown, preventing the sagging and warping common in lower-quality caps.
Each panel is cut on the bias to maximize stretch recovery, then joined with double-needle stitching that reinforces every seam. The front two panels feature an additional layer of buckram interfacing that maintains the cap’s structured silhouette without feeling stiff or uncomfortable.
Adjustable Fit System

Snapback Closure Design
The GUI Cap features our proprietary snapback adjustment system with seven positions spanning a 2.5-inch range. This accommodates head circumferences from 21.5 to 24 inches, covering approximately 95% of adult head sizes.
Unlike metal or fabric closures that can pinch or pull hair, our smooth plastic snapback mechanism adjusts cleanly and stays secure during movement. The flat profile sits comfortably against the back of your head without creating pressure points during extended wear.
Care & Maintenance Instructions

To preserve the GUI Cap’s structure and color, we recommend spot-cleaning with a damp cloth and mild detergent. For deeper cleaning, hand wash in cold water using a gentle soap, then air dry on a flat surface or form.
Avoid machine washing, which can damage the buckram interfacing and distort the crown shape. Never put the cap in a dryer, as heat will cause the fabric to shrink and the brim to warp.
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What people are saying
Questions About the GUI Cap
The GUI Cap is our signature six-panel structured baseball cap, distinguished by premium cotton twill construction and refined fit details. Unlike mass-produced caps that use thin fabrics and basic stitching, we engineer each GUI Cap with reinforced front panels, moisture-wicking sweatband, and a custom snapback closure system.
The name reflects our brand identity—Gui Gui—and this cap serves as the cornerstone of our headwear collection. When customers ask what is a GUI Cap, we explain it as the intersection of classic baseball cap styling and modern comfort engineering.
The GUI Cap’s adjustable snapback closure accommodates head circumferences from 21.5 to 24 inches, which covers most adult sizes. To measure your head, wrap a flexible tape measure around your forehead just above your ears, keeping it level.
If you fall within this range, the cap will fit comfortably with room to adjust. The seven-position snapback lets you fine-tune the fit throughout the day. If you’re between sizes or have a particularly large or small head, contact our customer service team for personalized sizing guidance.
We do not recommend machine washing the GUI Cap, as agitation can damage the buckram interfacing that gives the cap its structured shape. Instead, spot-clean with a damp cloth and mild detergent for minor dirt and sweat.
For deeper cleaning, hand wash in cold water using gentle soap, then air dry on a flat surface or cap form to maintain the crown shape. Never put the cap in a dryer, as heat will cause shrinkage and brim warping. Following these care instructions will preserve your cap’s appearance and structure for years.
The GUI Cap shell is made from 100% cotton twill, a tightly woven fabric that provides durability and breathability. The front panels include buckram interfacing—a stiffened fabric layer that maintains structure without adding bulk.
The sweatband uses a polyester moisture-wicking material that draws perspiration away from your skin. The snapback closure is made from durable plastic with metal rivets securing it to the cap body. All materials are tested for colorfastness and durability before production.
The Gui Gui logo is embroidered directly into the front panel using commercial-grade thread, not printed or heat-transferred. This construction method ensures the logo remains intact through years of wear and washing.
Embroidery thread is colorfast and won’t fade with normal sun exposure or cleaning. Unlike screen-printed logos that crack and peel, embroidered designs actually become softer and more integrated with the fabric over time while maintaining their appearance.
We offer a 30-day satisfaction guarantee on all GUI Cap purchases. If you’re not completely satisfied with the fit, style, or quality, return the unworn cap in its original packaging for a full refund or exchange.
Simply contact our customer service team to initiate a return, and we’ll provide a prepaid shipping label. Once we receive the returned cap and verify its condition, we’ll process your refund within 3-5 business days or ship your exchange immediately.
Yes, the GUI Cap’s brim is designed to hold custom shaping. The pre-shaped curve we apply works well for most wearers, but you can adjust it to your preference.
To create a deeper curve, gently bend the brim while holding it over steam for 10-15 seconds, then shape it with your hands and allow it to cool. For a flatter brim, place the cap brim-down under a heavy book overnight. The eight rows of reinforcement stitching will maintain whatever shape you create.





