Retail price was recorded at collection time and may differ at checkout.
Coupang delivers inside Korea only, so we link to the brand’s own page instead. The price above is the Korean retail price.
Flextra
A control-oriented rubber built for stable, consistent strokes. Recommended for players looking to sharpen their forehand game.
Performance
Butterfly official, 0-100About this product
A non-tacky inverted rubber. Hardness 32°, among the softest of Butterfly’s inverted rubbers on this site (Rozena 35°, Tenergy 05 36°, for comparison). Described as offering good control and a stable, settled stroke.
At ₩22,000, the cheapest Butterfly inverted rubber on this site. The combination of a soft sponge and a low price reads as a fit for getting comfortable with inverted rubber itself, before moving up to the Tenergy or Dignics lines.
What the numbers say
Inverted, 32° sponge. Its spin of 1.0 ranks 20 of 20 rubbers, among the lowest. It throws a lower, flatter ball. Based on the manufacturer’s published figures.
This paragraph is not a copied review — it is generated from the figures and rankings collected on this site, and changes when they do.
Full specifications
| Surface type | Inverted |
| Tackiness | Non-tacky |
| Sponge hardness | 32° |
| Thickness options | 2.1mm |
| Colours | Red / Black |
| Made in | Japan |
Blades that pair with this rubber
Real player setups and level-based recommendations come first.
Hurricane Hao 2
5-ply (all-wood)
A slower blade — easier-handling rubbers suit it
Hurricane Long 5X
5-ply + 2 Arylate-Carbon plies (X construction)
A slower blade — easier-handling rubbers suit it
NOVUS Allround S
5-ply all-wood (Limba)
A slower blade — easier-handling rubbers suit it
NOVUS Aegis
5-ply all-wood (Limba)
A slower blade — easier-handling rubbers suit it