This tempo trainer has a firm, responsive EVA midsole and a snug, race-ready fit.
The RW Takeaway: The midsole feels firm and less bouncy than a Boost shoe, but the SL20 is still light enough for long tempo runs and short races.
- Built on the Adizero last, it has a snug, secure fit.
- An EVA midsole provides firm, protective cushioning.
- Continental rubber under the forefoot keeps you planted at speed.
Weight: 229g (M); 187g (W)
What do you get if you take an Adidas Boston, swap out the Boost foam, and knock $20 off the price tag? The SL20. Longtime wearers of the Boston line will feel at home from the second they slip their foot in and experience the traditional fit from Adidas’s fastest shoes. Anybody accustomed to a cushier, beefier daily trainer will like the lightweight pop the SL20 delivers for uptempo sessions. And all will appreciate the dependable Continental rubber covering the entire forefoot, which held firm even on rain-slicked sidewalks.