Going through Costco today and saw this entry level gaming chair on offer. I sat on it for a few minutes and the seat cushion felt thick, sturdy and comfy. (Officeworks sell the same chair and claim it is good for 8+ hours of usage time. Hopefully they mean in one session and not in total!) Looks like it sells around $249 everywhere else and I don't know if it is available in Costco stores nationally.
SPECIFICATIONS
Model name ONEX GX2
Available colours Black, Black/Blue
Recommended capacity 125kg (150kg max.)
Colour lighting N/A
Foam type High density foam
Frame type Metal
Adjustable armrests N/A
Adjustable backrest 90°–180°
Mechanism type Butterfly mechanism
Rocking mechanism Yes (3°–18°)
Rocking mechanism lock N/A
Gas lift class & height Class 4, 100mm max.
Base size and type 350mm nylon base
Caster size & material 65mm nylon caster
Caster brake N/A
Cover material Leatherette
Overall dimension (WxDxH) 69cm x 73cm x 128–138cm
Backrest dimension (WxH) 55cm x 85cm
Seat dimension (WxD) 53cm x 54cm
Product weight 21kg
Same price in Costco North Lakes QLD as well.