Sundek 31 Vintage USA 44-25 Nylon Rainbow Swim Shorts Size 31 Fit W29-30
OVERVIEW

Vintage Sundek Made in U.S.A. swim shorts, model/reference 44-25, made from lightweight 100% nylon and featuring the brand’s classic curved Rainbow stripe across the back.

This is an earlier Sundek construction with a compact vintage surf silhouette and a noticeably smaller fit than the tagged numerical size.

Tagged Size 31
Best modern fit approximately W29-30
100% Nylon
Made in U.S.A.
Vintage production
Dark navy / near-black color
Signature curved Rainbow back stripe
Rear patch pocket with Sundek logo
Contrast stitching
Lace-adjusted fixed waistband
No inner liner
MEASUREMENTS

Measured laid flat:

Waist: 38 cm / 15.0 in
Doubled Waist: 76 cm / approx. 29.9 in
Total Length: 35 cm / 13.8 in
Rise: 29 cm / 11.4 in
Inseam: 7 cm / 2.8 in
Leg Opening: 29 cm / 11.4 in
Tagged Size: 31
Recommended modern fit: approximately W29-30

The tagged size must remain the primary size, but based on the actual 38 cm flat waist this pair clearly runs smaller than a modern W31.

BRAND POSITION

Sundek is strongly associated with classic surf and beach culture and is particularly recognizable through its curved Rainbow stripe construction.

Earlier USA-made examples remain more interesting than standard later-production swim shorts because they combine:

U.S. manufacture
Early nylon construction
Older numerical sizing
Short vintage surf cut
Signature Rainbow detailing
Traditional lace-fastened waistband
Comparable vintage USA-made Sundek shorts remain actively offered in the resale market, including 44-25 and similar archive examples.