Knockaround Black Foldable Triangle Case review

Knockaround's Black Foldable Triangle Case is a magnetic clamshell hard case that folds into a triangle, with a faux leather outside and a velvet inside. Knockaround publishes the numbers most brands skip: 6.25 inches wide, 2.5 inches tall, 1.75 inches deep and 4.5 ounces, which makes it one of the slimmer hard cases here and easy to compare with your frames. It fits every Knockaround style except the Campeones, so it should take most mid-size frames from other brands too. The magnetic closure is quicker than a zipper and the price is $15.00. The trade-off is security: a magnet can pop open if the case is squeezed in a packed bag, where a zipper stays shut. Knockaround also sells a Hard Snap Case and a fabric Black Zipper Case for buyers who prefer other closures. We compared documented features and published prices.

Who it is for

buyers who want a magnetic clamshell instead of a zipper

Price

$15 per case.

BLACK FOLDABLE TRIANGLE CASE $15
Quoted from the vendor pricing page on November 13, 2026.

Key features

• Magnetic clamshell closure in a triangle shape
• Faux leather exterior and velvet interior
• Measures 6.25 in wide x 2.5 in tall x 1.75 in deep
• Weighs 4.5 oz
• Fits all Knockaround sunglasses except the Campeones

Strengths and weaknesses

• Strength: Magnet opens and closes faster than a zipper
• Strength: Dimensions and weight are published
• Strength: 1.75 in deep, slimmer than the Chums Vault
• Weakness: Magnet holds less securely than a zipper in a jostled bag
• Weakness: Does not fit Knockaround's own Campeones frame
• Weakness: Faux leather, not real leather

Key facts

• Price: $15.00
• Closure: Magnetic clamshell
• Size: 6.25 x 2.5 x 1.75 in
• Weight: 4.5 oz
• Lining: Velvet

Where it ranks

Knockaround Black Foldable Triangle Case is No. 7 in our Best Sunglasses Cases verdict.