Use info about Superdry:

Superdry is a Brand built on the Spirit of Adventure and an attitude of fearless creativity. We have encapsulated this with the newly launched Superdry Luggage set and is all backed by a 5 YEAR "BUILT TO LAST" WARRANTY. Superdry pride themselves on the quality and durability of their luggage cases; to this extent all products are backed by a 5-year warranty replacement service covering all manufacturing defects. Buy with absolute confidence.

This about testing:

SATRA STANDARD TESTED QUALITY ASSURED Experience the ultimate in quality and durability with this suitcase. Tested for endurance and longevity on various surfaces and conditions, it features 8 spinner wheels for full 360-degree manoeuvrability. The ultra-hard-sided body has passed a drop test, and the trolley handle has undergone strength and bend capacity testing, ensuring it can withstand the rigours of travel.
WHEELS & HANDLES 5km Rolling road tested wheels, stress tested handles and lightweight telescopic trolley system. Hard wearing hard sided suitcase with top and side carry handles. SELF REPAIRING ZIPS If the zipper (after being closed or zipped) were to come apart (the closed zipper teeth), you can simply unzip and re-zip the bag and it would close (or self heal).

Superdry 24 Inch Medium Suitcase - Lightweight 3.5kg, Robust, TSA Locks, with 8 Smooth Spinner Wheels, Telescopic Trolley System, Clothing Retention Straps & 63 Litre Capacity (Black/Silver, Medium)