The ErgoBalance stirrup design actually helps keep the riders foot flat in the stirrups by allowing for the natural curve of the horses body and the riders legs. The angled neck cone helps keep the stirrups level so your foot can rest flat in the stirrup, greatly reducing the knee and ankle fatigue and strain experienced by some riders.

The ErgoBalance Stirrup helps keep riders foot flat in the stirrup; the large end of the cone goes towards the horse.