These are highly recommended and used by several people I know in the industry

https://www.amazon.com/dp/B01E66QG9C/?coliid=I1QASRICJUGAPR&colid=WGMTJV433DPB&psc=1&ref_=lv_ov_lig_dp_it

also: https://www.amazon.com/Hisea-Insulated-Neoprene-Waterproof-Durable/dp/B07MB8R5C4/ref=sr_1_4?dchild=1&keywords=Men%2BWaterproof%2BInsulated%2BMen%27s%2BNeoprene%2BMuck%2BOutdoor&qid=1588260484&s=apparel&sr=1-4&th=1&psc=1

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Depending on what he's doing a simple mask will work (most don't use them unless mixing chemicals though. A face shield for turbo nozzle use on pavers is nice. Obviously right now masks are hard to come by or I'd recommend N95's. Working with Sodium Hypochlorite (bleach) day in and day out you "should" take the appropriate precautions. Most guys only use respirators etc when using roof mixes (higher % of SH).

Face Shield with ballcap https://www.amazon.com/Anti-Spittle-Dust-Proof-Detachable-Adjustment-Compartment/dp/B0872SM16Y/ref=sr_1_19_sspa?crid=1NUOXB6O3QH62&dchild=1&keywords=face+shield+outdoor&qid=1588260714&sprefix=face+shield+out%2Caps%2C269&sr=8-19-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRFVWR1FJWUpHQktPJmVuY3J5cHRlZElkPUEwMjQxNDAxODlCSjM2WExDWEs1JmVuY3J5cHRlZEFkSWQ9QTAxNTM2NTMxNjFJTE5QNUFYQSZ3aWRnZXROYW1lPXNwX210ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Safety glasses if he doesn't have a pair of sunglasses that double as those. https://www.amazon.com/Smith-Wesson-21303-Sunglasses-Anti-Fog/dp/B01GUXOX26/ref=sr_1_12?crid=2FN84ZSRHEJQ0&dchild=1&keywords=tinted+safety+glasses&qid=1588260852&sprefix=tinted+safet%2Ctools%2C287&sr=8-12